Macro fertilizer w/o KNO3

HI Fishlore community. I've been thinking about mixing my own Macro nutrient solution without using KNO3. I've been using a pre made PPS Pro mix, but I figure it would cost less in the long run to mix it myself. Is it possible to up the amount of KHPO4 and K2SO4 to make up for the decreased K from not using KNO3? Any drawbacks or dangers to my plants and fish if I do that?

 

HI Fishlore community. I've been thinking about mixing my own Macro nutrient solution without using KNO3. I've been using a pre made PPS Pro mix, but I figure it would cost less in the long run to mix it myself. Is it possible to up the amount of KHPO4 and K2SO4 to make up for the decreased K from not using KNO3? Any drawbacks or dangers to my plants and fish if I do that?

That's perfectly fine as long as your nitrates are at least 20 ppm

 

Yea my tank is at 20 ppm right now. Last 30% wc was 2 days ago.

These are the numbers I got from playing around on an online calculator:

 

Sounds like a good plan to me. The basic pps pro and EI dosing recipes are very generalized so tweaking is encouraged.

 

Where did you get the calculator ive been thinking I should start making my own ferts too

 

https://www.aquariumcalculators.com/aquarium-plant-food/pps-pro/

This is the PPS Pro calculator I was using but if you click through the menu they have other dosing calculators too.

 

Thanx